Constructional material



waterproofing mastic.

.material, such as,

UNT

STTES PATENT OFFICE ALBERT C; FISCHER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE PHILIP CAREY MANU- 'JFACTURING COMEA'NY, A CORPORATION" OF OHIO GONSTR'UCTION'AL MATERIAL 1T0 Drawing.

This invention relates to constructional roofing material, insulatirfig material, tapes, shingles, packing and the l' e.

The object of my present invention is to provide such constructional materials with an adhesive coating which is normally sticky or tacky to the touch and which lastingly maintains this mastic condition whereby the material may be packed and stored for long periods of time without losing its tackiness and may be transported to its place of installation and used in such tacky .condition without further treatment.

A further object of my invention resides in the application of this normally lastingly adhesive sticky to the touch, to sheets or strips of carrier material, hereinafter called vehicles, so that when rolled into package form or placed face to face in contact with a similar sheet for packing and storing and transportation, they may be unrolled or pulled apart readily without tearing or darnaging, and can be installed in tacky condition; in this instance the tacky coating permits the facile separation of the contacting vehicle surfaces, the line of cleavage passing through the mastic itself. The vehicle thusprovided with a lasting adhesive, mastic coating 1s particularly adapted to act as a packing for various types of installation, not only because of the waterproofing quality of the mastic but also because of its pronounced and lasting quality of adhesiveness and further because of its plasticity.

A further object of my invention resides in providinga constructional material which is lastingly adhesive and normally sticky to the touch, composed of fiber incor orated in a dense waterproofing mastic, an wherein the fiber and mastic are formed into sheets, or other desirable shapes, and coated with a slow-drying adhesive of bituminous or other origin, which is normally sticky and tacky to the touch. Alternatively, the fiber and dense waterproofing mastic and slow-drying adhesive may be incorporated together.

In the present invention, in, one of aspects I prefer to incorporate fiber in a dense The mixture is then Application filed. August 15, 1927. Serial No.

its

pressed into thin sheets or other shapes, and 15 then coated with a slow-drying adhesive of bituminous or vegetable nature, which adhesive is normally tacky and sticky to the touch and lastingly adhesive. Alternatively, this fiber, the dense waterproofing mastic and the slow-drying adhesive may be incorporated together. The slow-drying adhesive should preferably be incorporated when the dense mastic is in a relatively chilled state, for instance, 125 F.

The slow-drying adhesive herein referred to comprises a slow-drying, tacky mastic of bituminous, vegetable or animal nature, or a combination of two or more, which approximates the following specifications; or may be more or less fluid;

(1) The consistency at 77 below 7.0.

(2) The susceptibility factor should be as low as possible, preferably under 25.

(3) The ductility at 77 F. should be as high as possible and preferably over 25 centimeters.

it) Fusing point by K & S method should be F. should be etween 80 and 100 F.

5) It should appear tacky and adhesive at normal temperature, and retain this property as long as possible on exposure to air.

1t will be understood that my invention contemplates constructional material, the adhesiveness of which serves to hold said material in place in distinction to other materials which involve the use of pitch, or other material, mopped on at the time of assembling the material. This is especially true in the application of the invention to roofing sheets, for the purpose of holding the sheets of roofing material in place. It will be understood that after two sheets of building material according to the present invention have been separated, the adhesive surface of one sheet will be placed in contact with the non-adhesive surface of another sheet. The adhesive or mastic will cause a union with non-adhesive surfaces to which it is applied, which union may be made very excellent by means of rolling and which will improve in the course of time.

It will also be understood that if it should be found that the adhesive surface of a sheet should become dried out, a solvent such as toluol, benzol, kerosene, or cotton oil, may be used to bring the sheet back'into adhesive state.

The subject matter of this application has been withdrawn from my prior Patent, No. 1,550,310, issued August 18, 1925.

I claim:

1. Constructional material comprising a sheet molded from a mixture of fiber and dense waterproofing mastic intimately commingled, said sheet being coated on one exposed face with a slow-drying adhesive which is lastingly adhesive and sticky to the touch. 4

2. constructional material comprising a molded sheet formed of an intimately commingled mixture of dense waterproofing 2o mastic and fiber, and coated on one exposed face with a slow-drying substance lastingly adhesive and sticky to the touch.

3. constructional material comprising molded sheet formed of a dense waterproof- 25 ing mastic of. bituminous nature, having fibers incorporated therein and coated on one exposed face with a slow-drying mastic of lasting adhesiveness and sticky to the touch. Signed at Chicago, Illinois, this 9th day of 30 August 1927.

ALBERT C. FISCHER. 

